If you own an iPhone you know the battery does not last that long, especially if you are using the Internet or GPS throughout the day. If you don’t have a charger in your car or at your desk then by the end of the day your phone is about dead. So how can you make your iPhone last all day? The solution is the PowerSkin, an iPhone case that has a built-in battery. This will give your iPhone the extra boost it needs to get through the day. Let’s take a look…